Enrollment in the Affordable Care Act through Colorado's health insurance exchange is barely half the state's worst-case projection, prompting demands from exchange board members for better stewardship of public money.

The shortfall could compromise the exchange's "ability to deliver on promises made to Colorado citizens" and threatens the funding stream for the exchange itself, according to board e-mails obtained by The Denver Post in an open records request.

The exchange, meant for individuals and small groups buying insurance, had projected a lowest-level mid-November enrollment of 11,108, in a presentation to a board finance committee. The exchange announced Nov. 18 that it had signed up 6,001 Coloradans so far…

Colorado is one of 14 states running its own exchange, while the troubled federal healthcare.gov site handles the exchanges for 36 other states.

The exchange has not hit either internal projections or those made earlier by consultants supportive of the Affordable Care Act, said board member Dr. Mike Fallon, a conservative voice on the board who calls the act overly complex and expensive.

"None of this surprises me," Fallon said of the shortfall. "I don't know what we as a board could have done. Health insurance is a difficult product to sell."

Other board members said hitting enrollment marks now is not as important as making sure exchange websites and call centers work smoothly when people are ready to sign up…

"In the midst of this situation, the communication from the (executive director) to the board has been that the launch is successful, even 'fabulous,' with a few glitches," Daehnick wrote fellow board members on Oct. 24. "Available information does not support this assertion."